John c



`(No-lllodel.)

J. C. GAVANAUGH.

PIPE THREAD GUTTER.

No. 548,180. PatentedOot. 22, 1895.

.1F91A l y Jamam/wmk Y Nits-n "Tarn-s ATENT OFFICE.

JOHN C. CAVANAUGH, OF DAVENPORT, IOWA.

PIPE-THREAD CUTTER.

SPECIFICATION forming part of Letters Patent No. 548,180, dated October22, 1895. Application filed July 10, 1894. Syerial No. 517,123. (Nomodel.)

To all whom t may concern.' Be it known that I, JOHN C. OAVANAUGH,citizen of the United States, residing at Davenport, in the county ofScott and State of Iowa, have invented a new and useful Pipe- ThreadCutter, of which the following is a specication.

This invention relates to pipe-thread cutters; and it has for its object.to provide a new and useful tool of this character having new andsimple means for cutting a right or left hand thread on iron or otherpipes in whatever position the same may be located.

To this end the main and primary object of the present invention is toeffect certain improvements in tools of this character, whereby the sameWill operate without any undue force or labor andcan be easily andreadily adjusted and manipulated.

With these and other objects in view, which will readily appear as thenature of the invention is better understood, the same consists in thenovel construction, combination, and arrangement of parts hereinaftermore fully described, illustrated, and claimed.

ln the accompanying drawings, Figure 1 is aperspective View of apipe-thread cutter constructed in accordance with this invention. Fig. 2is a central longitudinal sectional view thereof. Fig. 3 is a transversesectional view on the line x of Fig. 2. Fig. 4 is a longitudinalsectional view of the revolving tool-stock, with one of the removablefeed attachments connected thereto. Fig. 5 isa series of sectional viewsshowing dierentI sizes of feed attachments for threading diEerent-sizedpipes.

Referring to the accompanying drawings, 1 designates a cylindricalrevolving tool-stock that has fitted thereon at an intermediate pointthe ratchet-wheel 2, on both sides of which are loosely mounted theyoke-rings 3, extended at one side into the handle-strap 4, betweenwhich is secured one end of a suitable operating-handle 5. The saidratchetwheel 2 is adapted to be engaged by the double catch-pawl 6, thatis pivotally mounted between the handle-straps 4 on the pivot-bolt 7,and on one side of the point of pivot the said catch-pawl is providedwith a V or wedge shaped boss 8, with which normally contacts theV-shaped adj usting-head 9. The V-shaped adj usting-head 9 is mounted toslide between the handle-straps 4 up to and beyond the attached end ofthe handle 5 and is provided with a guide-stem 10, which works in thesocket 11, formed in the said attached end of the handle, and said stemis encircled by a spring 12, that normally projects the head 9 beyondvthe adjacent handle end and into contact with one of the beveled sidesof the V-shaped boss 8. By. pressing the said V-shaped adjustinghead 9against the adjacent end of the handle it will be obvious thateitherpoint of the double lcatch-pawl may be engaged with the ratchet-wheel 2,and by then allowing the said adjusting-head to spring outward, one ofthe beveled sides thereof will contact with one of the beveled sides ofthe boss 8, so as to hold the engaged point of the pawl on theratchet-wheel to ride freely thereover in one direction and engage thesame in an opposite direction. By means of this construction thecatch-pawl 6 may be quickly reversed to reverse the rotation of thecylindrical tool-stock l when necessary.

rl`he cylindrical revolving tool-stock 1 is enlarged at one end into anintegral squared die-box 13, in which is adapted to be fitted a set ofordinary thread-cutting dies, illustrated in dotted lines in thedrawings, but which form no part of the present invention. The saiddiebox 13 is squared or made rectangular in shape to provide forproperly accommodating the dies that are placed therein, and after thedies are fitted in said box the same are held firmly' in place thereinby means of the hinged cap plate 14. The hinged cap-plate 14 is squaredor rectangular in shape to correspond with the shape of the box 13, soasto inclose the same, and said cap -plate is hinged or pivoted at onecorner to one corner of the box 13 on the pivotscrew 15, and at itsdiagonally-opposite corner the said cap-plate is 'provided with anintegral hook 16, that is adapted to be engaged over the shank of aclamp thumb-screw 17, mounted to work in a threaded opening or socket18, formed at one corner of the box 13. By tightening the screw 17 ontothe hook end of the cap-plate 14 the same will be held tightlypositioned over the outer open end of the box 13, and by loosening thesaid clamp- IOO screw the said cap-plate may be swung aside for thepurpose of gaining access to the interior of the die-holding box.

The hinged cap-plate 14, arranged at the box end of the revolvingcylindrical toolstock, is provided With a central pipe-opening 19, thatis adapted to be aligned with the central bore of the stock in order toaccommodate the end of the pipe operated upon, and at its end oppositethe box 13 the said cylindrical tool-stock is extended beyond one sideof the ratchet-Wheel thereon into an interiorly-threaded feed-neck 20,that is adapted to receive an exteriorly-threaded feed-collar 2l. Theexteriorly-threaded feed-collar 2l is provided at its outer end with astopcollar 22, that is adapted to contact with the neck end of the stockto limit the feed of the tool, and said stop-collar is provided with athreaded opening 23, in which works a thumbscrew 24, which is adapted toclamp the feedcollar tight onto the end of the pipe to be threaded. Inusing the tool it is therefore simply necessary after placing the diesin position to start the feed-collar in the feed-neck of the stock andthen slip the said collar over the pipe end to be threaded and clamp thesame tight thereon. By then working the handle 5 back and forth tooperate the ratchetwheel the tool-stock Will automatically feed itselfon the feed collar and will advance the cutting of the threads n the endof the pipe.

In order to provide for threading all sizes of pipe, from the smallestto one inch in diameter, and also to make provision for cutting the pipeWith left-hand threads as Well as right, a removable attachment feed-cap25 is employed. The attachment feed-cap 25 is adapted to t over thefeed-neck 20 of the tool-stock and is provided in diametrically oppositesides of the socket end thereof with the Tshaped slots 26, that areadapted to be slipped over and turned into locking engagement with thediametrically-opposite lockstuds 27, projected integrally fromdiametrically-opposite sides of the neck of the revolving tool-stock.The saidattachrnent feed-cap 25 is provided with an outerinteriorlythreaded end 28, that is adapted to receive anexteriorly-threaded collar 2l in the same manner as the feed-neck 20itself; but it- Will be understood that by the employment of anattachment-cap 25 the interior threads thereof may be either right-handor left-hand to correspond With the threads of the feed-collar mountedto Work therein, and the feed-collar may be made in different sizes totit different pipes, so that all conditions of Work are provided for inthe herein-described tool.

Changes in the form, proportion, and the minor details of constructionmay be resorted to Without departingfrom the principle or sacrificingany of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is

1. In a pipe thread cutter, the combination of a tool stock provided atone end with a die holder, and extended at its opposite end to form aninteriorly threaded feed neck, an attach ment feed cap adapted to beremovably fitted on said feed neck and provided with an interiorlythreaded outer end, and an exteriorly threaded feed collar carrying aclamp screw, substantially as set forth.

2. In a pipe thread cutter, the combination of a paWl and ratchetoperated cylindrical tool stock provided at one end with a. die holderand extended at its opposite end to form a feed neck havingdiametrically oppo site exterior lock studs, a removable attach mentfeed cap adapted to be fitted over said feed neck and provided at oneedge with diametrically opposite Tslots adapted to interlock with thelock studs of the feed neck, and with an interiorly threaded outer end,and an exteriorly threaded feed collar carrying a clamp screw andadapted to work in the interiorly threaded outer end of the feed cap,substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of three Witnesses.

JOI-IN C. CAVANAUGH.

Witnesses:

MICHAEL J. FEENEY, E. M. SHARON, OTTO F. BELTER.

